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发明名称
RAILROAD GRADE CROSSING
摘要
申请公布号
AU5846180(A)
申请公布日期
1980.11.27
申请号
AU19800058461
申请日期
1980.05.16
申请人
RAILROAD FRICTION PRODUCTS CORP.
发明人
J.C. KAHR;C.H. LOGAN
分类号
E01C9/04
主分类号
E01C9/04
代理机构
代理人
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